2 Samuel 18:11-13

11 And Joab said to the man that told him, And, behold, you saw him, and why did you not smite him there to the ground? and I would have given you ten shekels of silver, and a girdle.

12 And the man said to Joab, Though I should receive a thousand shekels of silver in my hand, yet would I not put forth my hand against the king's son: for in our hearing the king charged you and Abishai and Ittai, saying, Beware that none touch the young man Absalom.

13 Otherwise I should have worked falsehood against my own life: for there is no matter hid from the king, and you yourself would have set yourself against me.